Apparatus for covering articles



' y 1932. HJP. DE CORREVONT 1,856,694

APPARATUS FOR COVERING ARTICLES Filed Nov. 1, 1929 4 Sheets-Sheet 1 i g,fi zuarczfa rrari y 3, 1932- H. P. DE coRREVoNT APPARATUS FOR COVERINGARTICLES Filed Nov. 1', 1929 4 Sheet sSheet 3' y 3, 1932- H. P. DECORREVONT 1,856,694

APPARATUS FOR COVERING ARTICLES Filed Nov. 1 1929 4 Sheets-Sheet 4' vjwmr fizyaga fia [077 60072X wrapped hatented May 3, 1932 nowann r. asconanvonr,

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Arrmrus FOB covnmue narrows Application filed November 1, 1929. SerialNo. 404.0343.

My invention relates to a method and anapparatus for coating an article,particularly a. toilet seat, with a sheet of pyroxylin.

One object of my invention is to provide a method and an apparatus inwhich suction is utilized to wrap a sheet of pyroxylin about a core.

Another object sheet of pyroxylin is subjected to the action ofheatwhereby it is rendered plastic, and also to a partial vacuum forwrapping the sheet about a core.

Other objects and advantages will appear as the description proceeds.Referring to the accompanying drawin s:

ig. 1 is a front elevational view of a machine embodying my inventionand by which my process may be carried out, the parts being shown in theposition they occupy after the sheet has been drawn about the core;

Fig. 2 is a sectional view on the line 22of- Fig. 1, parts being brokenFig. 3 is a sectional view 1;

ig. 4 is a sectional view on the line 4-4 of Fig. 2, parts being brokenaway; and

away; on the line 3-3 of Fig. 5 is a sectional view showing the core inan inverted position together with those parts immediately adjacent thecore, parts being broken away. lhe illustrated machine comprises a pairof clamping plates 1 and 2 for gripping a sheet of pyroxylin 3therebetween, a chest or receptacle 4 adapted to receive steam or hotair to render the pyroxylin sheet plastic; a bottom plate 5, and a seat6 carried thereby for supporting a core 7 in position to be by thepyroxylin sheet. The lower clamping secured to a frame 8 on a pluralityof supporting posts 9 and has a gasket 10 thereon. The. upper clampingplate 2 is carried by a iramell which is 12. Guides-13 on a head 14supported by the posts 9 are provided for directing the movement 101 therods 12. T

' The rods are connected at their top by a cross-bar 15 which is securedto a rod 16\on thereto and the of my invention is to pr0-- vide a methodand an apparatus in which a plate 1 is detachably.

secured to a pair of rods a piston '17 reciprocable in a fluid. pressurecylinder 18. I

A pipe 20 communicates with the steam chest orreceptacle 4 foradmittingsteam chest is provided with an outlet 21 for the emission ofsteam, so that siibstantially no pressure develops in the c est.

has apertures at its corners to receive. the posts 9, so that the chestmay be guided in an up-and-down movement. Y

The plate 22 is secured to a rod 23 actuable by a piston 24 which isreciprooable in a cylinder 25 by means of fluid' admitted through pipes26 and 27 The seat 6 has a chamber 28 therein which is covered by aplate 30 constituting a portion of the seat and on which the .core 7 issecured by means of ,ret ining pins 31 projecting upwardly from theseat-into core.

llhe seat is also provided with a plurality of small ducts 32 which areplaced along-the outer periphery of the core 7.

ere the core is provided with a central openin as in the case of atoilet seat, w is the orm of core illustrated in the draw ings, theducts 32 are also provided on the inner edge of the core.

.assrenon 'r'o m newsm a conroaarron or Dana: 1

The chest is secured to a plate 22which the body of the hich ' The seat6 is also provided with an opening 33 which communicates with thechamber 28 and also with a pipefid carried by the bottomplate 5. Thepipe 34 commu-m- 5 and interposed between it and the clamping late 1 anda pair of knockout pins 36 proect upwardly through the bottom plate, 5and through openings in I gage the bottom of the core 7 for forcing itofl he retaining pins 31 after the wrapping operation is completed.

The knock-out pins 36 are mounted on a plate 37 which is connected by arod 38 to a piston 40 in a cylinder 41 and fluid is admissible into thelower part of the cylinder .through' a port 42 for raising the seat 6and .en-

t the piston and" the knock-out pins. On thereliease of fluid.

the position shown the sheet. which carrier. It will be understoodthat-the maendof a rod recess at 58 to receive pressure, the plate 37 isretractable by means of-sprin 43 which extend between it and the carrier44 to which the cy der 41 is secured The carrier may be engaged andmoved up and down by a head 46 actuable by a piston 47 whichreciprocates: in a cylinder 48 on a block 50.-

The carrier is provided with wheels 51 which on its downward movementare engageable with tracks 52 mounted .on the posts 8 to permit thecarrier to be rolled laterally,

and m order to accomplish this lateral movement a rod 53 is provided onthe carrier, projecting downwardly and slidable upwardly and downwardlythrough 'an' eye 54 in the which is reciprocable by means of a piston 56in a cylinder 57.

e carrier 44 is movable laterally from in dotted lines in Fig. 1 tillitis directly over the head 46 and has a from the clamping plate 1. thelower end of the guide being tapered slightly so that as the carrier ismoved upwardly it will be caused to center more accurately: in posit on.Fig. 5 illustrates an arrangement of parts used when the core -7 isinverted so that the sheet of pyroxylin may be applied to its upturned.bottom. 4 In place of the seat 6, a seat 61 of somewhat'diflerent shapeis here provided having a peripheral recess 61' in which the core ismounted. restingon bolts 62 which are ad- 'justable in posit on. Thesuction pipe 34 on the bottom plate-communicates with the re'-' cessthrough-ducts 62', and the outer portion of the seat carries a gasket 63which engages a sheet of pvroxvlin 64. A clamping member 64'issubstituted for the clamping plate 1 on the frame 8 Y In carrying outmy improved process the sheet of pvroxvlin 3 is placed on the clampingplate 1 and the clamping plate 2 is then brought down bvmeans of thepiston 17 and the rod 18 until t engages the peripherwof is thussecurelv retained; The steam chest or receptacle 4 is then lowered untilits lower edge engages the clamping plate 2. Steam s then admitted tothe chest and the sheet of pyroxylin is thus made plastic.

,The carrier 5 mav at this time be in the position illustrated in dottedl nes in Fig. 1.

The particular seatdesired is placed on the chine may be used forcoating objects of various shapes, and accordinglv seats of differentshapes may be provided; Furthermore. even in coating a core of the shapeillustrated, either the bottom or the top may be first covered, andtherefore either seat 6 or seat 61 may be first placed on the carrier.It is assembled by merely lowering it onto. the

. of the drawings,

pyroxylin coating, is next assembled by means of the iston 56 and t \tostretch and to a guide depending to guide the sheet underneath the Thesteam chest or receptacle is next moved edges substitilted in the seatand center it in position.

If seat 6 is used as illustrated in Figs. 1 to 4 the core 7, afterhaving cement applied along its edges for securing the orcpins 31. By erod 55 a the en drawn into position over mg 1t down upon the retainincarrier 44 is t the head 46.

.The piston 56and the head 46 are then moved upwardly, bringing thelatter into en- T gagement with the carrier 44, raising it and the partsassociated with it, thus causing the core 7 to engage the pyroxy sheet 3and to move upwardly into the steam chest 4 to the position'shown inFig. 2, the upward movement of the core causing the pyroxylin sheetbegin to wrap about the core.

' Suction is then applied to the chamber 28 by means of the suctionpump, and the air is evacuated on the lower side of the sheet, thusdrawing it downwardly. The location of the ducts is such that the sheetis drawn inwardly; about the lower edges of the core, the shape of theseat being such as core.

upwardly exposing the top of the coated core,

the c ampmg'ring 2 is elevated, releasing the v knock of the pyroxylinsheet, and the not shown,

out pins are actuated to force the core 7 from the retaining pins'31.released is manuallyremoved from chine and the head 46 is then lowered,causing the wheels 51 to engage the track 52. after which the carrier ismoved laterally to the position shown in Fig. 1.

The pyroxylin sheet is next trimmed away The core being thus 7 v themafrom the edges ofthe core and the seat 61 is forthe'clamping plate 1.Another applicationof cement-is then made on the bottom of the corealong its edges and it is then placed in the seat 61 in an invertedposition as shown in Fig. 5. The clamping member 64' is substituted onthe frame 8 in place of clamping plate 1 and thesheetof pyroxylin 64 isplaced thereon. A new cycle of operations is then performed,substantially in the manner abovedescrilied, and. the new sheet ofpyroxylin is drawn snugly against the bottom of the core.

After the bottom is thus coated the core is removed from the machine andthe pyroxylin sheet is trimmed away from its edges.

The surface of a core coated by the dechest may be mounted fixedly inposition, and the clamping plates may be moved upwardly into cooperativerelation therewith. A substantial range of equivalents is contemplatedwithin the scope of the appended claims.

What I claim as new and desire to protect by Letters Patent is 1. In adevice for coating a core with a sheet oi pyroxylin, the combination ofmeans for holding said sheet about its periphery, a fixed support forsaid means, a movable heating chest having an open end, a support forsaid core movable into position to constitute a closure for said chestwith said sheet interposed therebetween as a partition, said supporthaving openings for the discharge of air from the space on one side ofsaid sheet, means for moving said chest and said movable support intosaid position, and means for producing a condition of lesser pressure onthe 'side of said sheet at which said movable support is located wherebysaid sheet, being plastic because of the action'of said heating chest,is drawn about and around the edges of said core.

2. In a device for coating a core with a sheet of pyroxylin, thecombination of a plurality of fixed guides, a clamp member fixed on saidguides and having an enlarged opening there- 80 in, a similar clampmember mounted for sliding movement into a position for gripping saidsheet of pyroxylin between it and said fixed clamp member, a heatingchest having an open end, means for raising said chest or lowering itinto engagement with said slidable clamp member, a support for said coremounted for lateral movement to and from a position beneath said sheet,said supportbeing upwardly movable from a position beneath 4 said sheetinto engagement with said fixed.

clamp member and having apertures for the discharge of air therefrom,means for 'eflI'ecting said upward movement, and means for producing acondition of lower pressure be- 46 neath said sheet and of greaterpressure thereabove whereby the air is discharged from beneath saidsheet and said sheet when rendered plastic by the action of said heatingchest is drawn downwardly about said core.

'80 3. In a device for coating a 'core with a sheet of pyroxylin, thecombination of means for gripping a substantially flat sheet ofpyroxylin along its periphery, means for heating said sheet, means forforcing a core against said sheet as thus gripped and thereby stretchingit and producing a partial wrapping of said sheet about said core, andmeans for producing a condition of lesser air pressure on the side ofsaid sheet which. said core 00 engages and of greater pressure on theother sideto thereby further wrap said sheet about said core.

In testimony whereof I hereunto subscribe my name.

. as gHowAR P. DE conREvoNr

